Sokkia iM-50 Series Operator's Manual page 78

4. Enter the arc From point data and press [OK].
5. Press {}/{} to select coordinates then press [OK].
To : Enter arc To point.
To/Center : Enter arc To point and Center point.
To/Intersect : Enter arc To point and Intersect point
(intersection of the tangents).
Center : Enter arc Center point.
Intersect : Enter arc Intersect point.
Center/Intersect: Enter arc Center point and Intersect point
(intersection of the tangents).
6. Enter the coordinates specified in step 5.
7. Press [OK] to proceed to arc parameter input.
• When entering multiple coordinates, [NEXT] is displayed
instead of [OK]. Press [NEXT] to input data for the next
point.
8. Enter other arc parameters.
(1) Direction (whether the arc turns right/left from the From
point)
(2) Radius (radius of the arc)
(3) Angle (subtended angle)
(4) Arc (distance along the arc)
(5) Chord (straight line distance between the From and To
points)
(6) Tan ln (tangent length)
(7) Bk tan (back tangent length)

• Parameters that can be entered may be restricted
depending on the coordinates specified in step 5.
" Specifying coordinates and curve parameters"
9. Enter curve parameters then press {ENT}. Other
parameters will be calculated.
• [TO]: Calculated coordinates for To point can be recorded.
[CENTER]: Calculated coordinates for Center point can be
recorded.
[INTSCT]: Calculated coordinates for Intersect point can
be recorded.
10.Press [OK] on the screen of step 9 to define the arc. <Set-
out arc> is displayed. Move to setting-out arc measurement.
"17.2 Setting-out Arc" step 2
S e l e c t P t .
LOAD
D i r e c t i o n :
R a d i u s :
A n g l e
A r c
C h o r d
Ta n I n :
B k t a n :
D i r e c t i o n :
R a d i u s
A n g l e
A r c
C h o r d :
CENTER
73
17. SETTING-OUT ARC
T o
OK
To P t .
REC MEAS OK
L e f t
< N u l l >
: < N u l l >
: < N u l l >
: 1 4 1 . 4 2 1 m
OK
< N u l l >
< N u l l >
OK
R i g h t
: 1 0 0 . 0 0 0 m
: 9 0 0 0 ' 0 0 "
: 1 5 7 . 0 8 0 m
1 4 1 . 4 2 1 m
INTSCT OK
